Lionel charles ltjtyens



July 6 1926.

c. LUTYENS MEANS AND METHOD FOR USE IN THE MANUFACTURE OF SHEETING FROM TACKY PLASTIC MATERIALS Filed April 20, 1926 g Inveniazfi- Patented m e, 1926.

- v UNITED sir-A TEs PATENT, o

FF'ICE."

LIONEL CHARLES LU'IYENS, OF LONDON, ENGELAND.

W8 ANDHETHOD FOR USE IN THE MANUFACTURE OF SHEETING'FBOM PLASTIC MATERIALS.

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Application filed April 20, 1926. serial at. 103,207.

This invention'relatesto the manufacture in sheet form of materials having in their.

composition a mixture of bitumen, pitch or the like and consists in a novel method of and apparatus for efiecting such manufacture whereby the operation is simplified and expedited and the quality of the sheeting is improved. r

The invention is particularly applicable for use in connection with the bituminated mixture forming the subject of my and Reginald Oswald Childs patent application Serial Number 21,181, filed 6th April, 1925, but it is also capable of employment in ren dering other materials of a similar character or composition in sheet form.

According to this invention, the bitumiwnated mixture which is of dou h-like convented from y provides afilm' whereby not only adherence the sides thereof.

sistency is rendered plastic byeating-the fected by gas jets arranged to impinge the. cheek plates.- These cheek plates also serve same to a temperature of approximately 5400? F ahr. and in this heated condition is applied'to an endless travelling apron or table composed of fabric and arranged about and. between rollers. The apron is preserved in a wet condition by passing the same at one oint through a bath of cold water, whic is preferabl in running or changing condition, and t e bituminatedmixturev thereon is continually wetted with water by means of the rollers between which it passes, the said rollers beings rinkled with or acted on continually by col water sprays.-

The water prevents the mixture adhering to the fabric of the apron and the rollers The apparatuscomprises a vessel adapted to receive the several rollers which are rotatively mounted thereon and about and between which the fabric apron or table is arranged to travel, the vessel being formed or provided with a well or transverse channel in the floor thereof for the passage of the running or changing water through which the apron at that point travels". Above the "rollers between which the apron runs are sprayers for water the sprays playing on the said rollers to keep them. cool and clear of the mixture carried on the apron. 'One or more of the rollers about which the apron is stretched may be driven from any suitable motor by abelt or other means. Owing and to lose its plasticity .at the sides or edges, provisionis made for imparting heat thereto by means of check plates which may con veniently be located at or. about the ends'of the sprayed rollers; the heating being efto provide a flange whereb the mixture is prevented from spreading eyond the limit of the roller ends. The apron is rendered adjustable by screw regulated bearings-or to the tendency of the mixture to become cold otherwise so that it may be maintained in a taut and workin condition.

In order that t e invention may be readil understood and carried into effect samewi now be more fully described with reference to the accompanying. drawings in which:-

form of the'apparatus for carrying out the improved method of sheeting.

Figure 2 is a correspondin Figure 3 1s;a transverse. ection approximately on the line 3- 3 in. igure 1.

- 0 indicates the apron or table of fabric which is in the form of an endless band and Figure 1 is a longitudinal section of a plan; the spraying means for the rollers belng omitted.

arranged to travel about the rollers b, a, d a

and between the pairs of rollers e e and f f. The rollers b, c and e, f are mounted in suitable su ports and hearings on the upper part 0 a vessel g; the roller d be1n arranged in the bottom of the said vesse which is formed with a well or channel It so that the fabric apron is caused to travel through cold water supplied to the channel by means of a feedpipe t or other suitable source of supply. The water is allowed to run away from the. channel by way of an outlet pipe k shown in dotted lines, in Figure 3. Thus a runing or changing stream of water is maintained in the channel h. One of the rollers 12, c is shown as bein driven rotatively by means of a belt b an ulley b the motive power being derived rom some available source not known; The

I ,of the mixture and prevents the same ad'- hering thereto but furnishes a film on the rollers to keep them cool. In the apparatus illustrated two pairs of rollers e e and/f f are shown but it is not a necessity to dupli- 1 and f plates m m and heating the same.

cate the rollers'although by the arrangement described and shown a better finish is imparted to the product. I

. The fabric apron or table a is maintained in tension by mounting one of the rollers b, 0' man adjustable bearing. In the example illustrated the roller 0 is so mounted, same being adjustable by means of the screws c .0

It will be seen that the bituminated mixture is applied to the fabric apron on table and'carried thereby between the rollers e e g and through the water channel It while eing wetted by.-- contact with the rollers e e f f which receive water from the spraying sources Z Z. Thus-the, surfaces of the rollers are cooled and freed from any particles of bituminated mixture and the apron is also enabled to resist any tendency for the mixture to adhere thereto.

The bituminated mixture in passing through the apparatus is liable to lose heat at the edges or sides and in order to prevent undue loss of heat and plasticity the said edges or sides are heated by means of plates or checks m m which receive heat from gas jets indicated by the pipes m m the jets from said pipes impinging on tile T e said plates being in close proximity to the sides or edges of the mixture layer on the apron a, transmits heat thereto and keeps the same from becoming cold and nonplastic. The plates or cheeks also serve asflanges in restricting the lateral extent of the layer and preserve a clean edge to the sheetingo It may .be observed that in using the bitumiumtedmixture hereinbefore referred The spraying of tono fibre is required in the treatment described as the dough-like mixture itself con tains the necessary amount of fibre or filler for enabling it to :form a texture and'impart the required strength to the sheet product.

What I claim and desire to secure by Letters Patent is a i 60 1. The herein described method of manufacturing sheeting which consists in heating a bituminated mixture of dough-like consistency to render itplastio, applying the heated and plastic mixture to an endless travelling apron of fabric, passing the latter with its layer of bituminous mixture be tween water sprayed rollers and through a cold water bath and between means adapted to heat the edges of the layer and prevent same from becoming cooled and de- "plasticized and to restrictthe lateral extent of thev layer.

2. Apparatus for the manufacture of sheeting which comprises a vessel having: a series of rollers mounted relatively thereto, a travelling fabric apron extended about some of said rollers and a water channel in the bottom thereof, rollers for the apron to pass between, means for spraying said rollers with water, means for heating the edges of the sheet of bituminate'd mixture on the apron on its passage between said rollers, means for operating one or more of the apron carrying rollers to impart the travelling movement to the apron and means for maintaining the apron taut.

3, Apparatus for the manufacture of sheeting which comprises a vessel having a channel in the bottom thereof, a travelling W apron of fabric for conducting the layer of bituminated mixture, rollers for supportmg and extending said apron, means for moving said apron, two pairs of rollers for the mlxture and the a ron topass between, 5 means for spraying sald rollers with water, heatlng places forming checks at the sides of the layer of bituminated mixture on the apron, gas ets for heating said cheeks and means for supplying the channel with run mng or changing water.

In witness whereof I have subscribed my signature Y L. C. LUTYENS. 

